CVE-2025-58702 is a vulnerability classified as CWE-79, indicating an Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This specific vulnerability affects the WebWizards MarketKing product, up to version 2.0.92. The flaw allows an attacker to inject malicious scripts that are stored persistently within the application, leading to Stored XSS attacks. Stored XSS occurs when malicious input is saved on the server and later rendered in web pages viewed by other users, enabling attackers to execute arbitrary JavaScript in the context of victims' browsers. The CVSS v3.1 base score is 6.5, which is considered medium severity. The vector indicates that the attack can be performed remotely (AV:N), requires low attack complexity (AC:L), but needs privileges (PR:L) and user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact affects confidentiality, integrity, and availability at a low level (C:L/I:L/A:L). No known exploits are currently reported in the wild, and no patches have been linked yet. The vulnerability arises from insufficient input sanitization or encoding during web page generation, allowing malicious payloads to be stored and executed when other users access the affected pages. This can lead to session hijacking, credential theft, unauthorized actions on behalf of users, or distribution of malware through the compromised web interface.

For European organizations using WebWizards MarketKing, this vulnerability poses a significant risk to web application security and user trust. Stored XSS can lead to unauthorized access to user accounts, leakage of sensitive information, and manipulation of user sessions. Organizations in e-commerce, retail, or any sector relying on MarketKing for marketplace management could face data breaches, reputational damage, and regulatory penalties under GDPR if personal data is compromised. The need for user interaction and privileges to exploit somewhat limits the attack surface, but insider threats or compromised user accounts could be leveraged by attackers. Additionally, the scope change indicates that the impact could extend beyond the immediate vulnerable component, potentially affecting other integrated systems or services. The absence of known exploits in the wild provides a window for proactive mitigation, but the medium severity and potential for chained attacks warrant prompt attention.

European organizations should implement the following specific mitigations: 1) Apply strict input validation and output encoding on all user-supplied data rendered in web pages, using context-aware encoding libraries to prevent script injection. 2) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 3) Enforce the principle of least privilege for user accounts to minimize the risk of privilege escalation and exploitation. 4) Monitor and audit user inputs and stored content for suspicious patterns indicative of injection attempts. 5) Segregate and sandbox components to limit the scope of potential XSS impact. 6) Since no official patch is currently linked, maintain close communication with WebWizards for updates and apply patches immediately upon release. 7) Educate users about phishing and social engineering risks that could facilitate exploitation requiring user interaction. 8) Implement multi-factor authentication to reduce the risk of compromised credentials being used to exploit the vulnerability.